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ololo11 [35]
3 years ago
5

Tom is 4 more than twice Andrew's age. Sara is 8 less than 5 times Andrew's age. If Tom and Sara are twins, how old is Andrew?

Mathematics
2 answers:
Ket [755]3 years ago
6 0
T=2A+4 
S=5A-8
If Tom and Sara are 10 years old,
10=2A+4
6=2A
3=A
Not sure though
dusya [7]3 years ago
5 0
Andrew= 4 years old
Sara= 12 years old
Tom= 12 years old
Basically, I did guess and check. First I started with Andrew 10 years old. I kept going down until I reached Andrew as 5 years old. I went 1 number down to 4 and that was perfect because that way Tom and Sara had the same age.

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Mary's math certificate is 10 inches tall and 13 inches wide. Mary wants to put the certificate
wlad13 [49]

Answer:

$219.70

Step-by-step explanation:

First, you need to find the area of the certificate, which you can do by multiplying 10*13, since it is a rectangle. 10*13 is 130. Then, multiply 130 by the price per inch, which is $1.69. 130*1.69=219.7, which in financial terms would amount to $219.70.

8 0
3 years ago
Expand and simplify 2(5x - 1) – (2x - 5) ​
horrorfan [7]

Answer:

2(5x - 1) – (2x - 5)

=2(5x−1)−2x+5

=10x−2−2x+5

=(10x−2x)+(−2+5)

=8x+3

Step-by-step explanation:

3 0
3 years ago
Need help. and original answer
siniylev [52]

The inequality written in interval notation is therefore -4<x<-1  or (-4, -1)

<h3 /><h3>What are inequalities?</h3>

Inequalities are expressions separated by the mathematical inequalities ≤, ≥, < and >

For instance a < b is a form of inequality.

<h3>What is a number line?</h3>

A number line is a line on which numbers are marked at intervals, used to illustrate simple numerical operations.

From the given number line, we can see that closed circles are on -4 and -1. The inequality written in interval notation is therefore -4<x<-1  or (-4, -1)

Learn more on inequality here: brainly.com/question/24372553

#SPJ1

7 0
1 year ago
According to an article in Marketing News, fewer checks are being written at the grocery store checkout than in the past. To det
alina1380 [7]

Answer:

ooga booga

Step-by-step explanation:

my feet smell like tooga

6 0
3 years ago
45 children attend preschool the number of two-year-olds is 1/2 the number of three-year-olds the number for your old is the sam
Mkey [24]
There are 9 two-year-olds and 18 each of 3 and 4 year olds.

To solve this we could write and solve the equation below, letting x be the number of 3 and 4 year olds.

x/2 + x + x = 45
x + 2x + 2x = 90
5x = 90
x = 18

From here, we just divide 18 by 2 to get the number of 2 year olds.
6 0
3 years ago
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